An organization has an iSCSI storage system accessed by 20 compute systems runni

Question

An organization has an iSCSI storage system accessed by 20 compute systems running a hypervisor over a physical Ethernet network. The network enables the transfer of compute-to-compute, compute-to- storage, and management traffic. The compute systems host several virtual machines that are accessed by 31 user groups. In addition, the network has two Ethernet core switches in an active/passive configuration and three edge switches that connect all the compute systems. Multiple VLAN trunk links exist between the core and the edge switches. However, recently the user groups are experiencing performance issues due to excessive utilization of the core switch and the trunk links. What can be implemented to minimize the performance issues? VLAN tagging Discovery domain Switch aggregation Self-forming network

Explanation / Answer

Implement SWITCH AGGREGATION to minimize the performance issues.

VLAN Tagging:

It is a method of creating independent logical networks within a physical network. This practice inserting a VLAN ID into a packet header in order to identify which VLAN the packet belongs to. VLAN Tagging support is specifically designed for networks where the ProxySG appliance is deployed in the path of VLAN tagged traffic; commonly this are a ProxySG appliance deployed between two switches, or between a switch and a router that is forwarding or bridging traffic. Without VLAN Tagging support, deployments in which an appliance is in the path of VLAN-tagged traffic often result in VLAN-tagged traffic being dropped, or passed through by a bridging configuration. With VLAN Tagging support, administrators can deploy the ProxySG appliance inline with any VLAN-tagged traffic and take full advantage of the functionality of the ProxySG appliance on those connections.

Discovery Domain:

A Discovery Domain is a security and management mechanism used by iSNS Servers to administer access and connectivity to iSCSI initiators or iSCSI targets (storage nodes) in an iSCSI SAN.

Switch aggregation:

Link aggregation is a way of bundling a bunch of individual (Ethernet) links together so they act like a single logical link. If you have a switch with a whole lot of Gigabit Ethernet ports, you can connect all of them to another device that also has a bunch of ports and balance the traffic among these links to improve performance. Another important reason for using link aggregation is to provide fast and transparent recovery in case one of the individual links fails. Individual packets are kept intact and sent from one device to the other over one of the links. In fact, the protocol usually tries to keep whole sessions on a single link. A packet from the next conversation could go over a different link. The idea is to achieve improved performance by transmitting several packets simultaneously down different links. But standard Ethernet link aggregation never chops up the packet and sends the bits over different links.

Self-forming networks:

these networks are able to respond to hostile actions such as Denial of Service (DoS) and Distributed Denial of Service (DDoS) attacks more efficiently than traditional networks. This ability is useful for deploying unmanaged computer networks. Self-forming networks are an adequate platform to deploy proposals like intelligent autonomous agents that require some degree of survivability in the network infrastructure.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.